WO2021206418A1 - Batterie secondaire et dispositif la comprenant - Google Patents

Batterie secondaire et dispositif la comprenant Download PDF

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Publication number
WO2021206418A1
WO2021206418A1 PCT/KR2021/004280 KR2021004280W WO2021206418A1 WO 2021206418 A1 WO2021206418 A1 WO 2021206418A1 KR 2021004280 W KR2021004280 W KR 2021004280W WO 2021206418 A1 WO2021206418 A1 WO 2021206418A1
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WO
WIPO (PCT)
Prior art keywords
secondary battery
blocking member
cid
current blocking
safety vent
Prior art date
Application number
PCT/KR2021/004280
Other languages
English (en)
Korean (ko)
Inventor
박정언
김찬배
김도균
노세원
Original Assignee
주식회사 엘지에너지솔루션
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020210044214A external-priority patent/KR20210124079A/ko
Application filed by 주식회사 엘지에너지솔루션 filed Critical 주식회사 엘지에너지솔루션
Priority to EP21784942.1A priority Critical patent/EP4089829A1/fr
Priority to US17/799,830 priority patent/US20230087398A1/en
Priority to CN202180016335.0A priority patent/CN115191062A/zh
Priority to JP2022547173A priority patent/JP2023513117A/ja
Publication of WO2021206418A1 publication Critical patent/WO2021206418A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a secondary battery and a device including the same, and more particularly, to a secondary battery having improved safety against high-temperature and high-pressure environments, and a device including the same.
  • the electrode assembly embedded in the battery case is a charging/discharging power generator having a stacked structure of a positive electrode, a separator, and a negative electrode, and is classified into a jelly roll type, a stack type, and a stack/folding type.
  • the jelly roll type is a form in which a separator is interposed between a long sheet-type positive electrode and a negative electrode coated with an active material
  • the stack type is a form in which a plurality of positive and negative electrodes of a predetermined size are sequentially stacked with a separator interposed therebetween
  • stack /Folding type is a composite structure of jelly-roll type and stack type.
  • the jelly-roll type electrode assembly is easy to manufacture and has advantages of high energy density per weight.
  • a cylindrical battery in which the electrode assembly is embedded in a cylindrical metal can, a prismatic battery in which the electrode assembly is embedded in a prismatic metal can, and the electrode assembly are embedded in a pouch-type case of an aluminum laminate sheet. It is classified as a pouch-type battery with Among them, the cylindrical battery has an advantage in that it has a relatively large capacity and is structurally stable.
  • the secondary battery includes, for example, a nickel cadmium battery, a nickel hydrogen battery, a nickel zinc battery, and a lithium secondary battery.
  • lithium secondary batteries are widely used in the field of high-tech electronic devices because of their advantages of free charge/discharge, a very low self-discharge rate, high operating voltage, and high energy density per unit weight as they do not have a memory effect compared to nickel-based secondary batteries. have.
  • FIGS. 1 and 2 a conventional cylindrical secondary battery having a safety vent will be described along with FIGS. 1 and 2 .
  • FIG. 1 is a partial cross-sectional view of an upper portion of a conventional cylindrical secondary battery.
  • a jelly roll-type electrode assembly 50 is accommodated in a cylindrical case 20 , and a cap assembly 30 is mounted on an open upper portion of the cylindrical case 20 to manufacture a cylindrical secondary battery 10 .
  • the cap assembly 30 may include a top cap 31 and a safety vent 32 for internal pressure drop, and the top cap 31 and the safety vent 32 for internal pressure drop may form a structure in close contact with each other. .
  • the safety vent 32 may be electrically connected to the electrode assembly 50 through a current interrupt device (CID) 60 .
  • the CID gasket 70 may surround the edge of the current blocking member 60 .
  • FIG. 2 is a partial cross-sectional view illustrating a state when the internal pressure of the cylindrical secondary battery of FIG. 1 is increased.
  • the shape of the safety vent 32 is reversed, and the current blocking member 60 is separated into two parts. cut off the current
  • the CID gasket 70 is positioned between the safety vent 32 and the current blocking member 60, and serves to prevent the safety vent 32 and the separated current blocking member 60 from being energized with each other.
  • the CID gasket 70 may be melted in an environment of high temperature and high pressure. Specifically, as shown in FIG. 2 , some CID gaskets 70 are melted, and the current blocking member 60 raised by internal pressure and the safety vent 32 come into contact with each other, and this causes the current to It cannot be blocked and reconnection may occur. Since the current cannot be cut off, the temperature may continue to rise, which may eventually lead to ignition and explosion of the cylindrical secondary battery 10 .
  • Embodiments of the present invention are proposed to solve the above problems of the previously proposed methods, and have an object of providing a secondary battery with improved safety even in high temperature and high pressure environments and a device including the same.
  • a secondary battery includes a current interrupt device (CID); a safety vent disposed on the current blocking member and electrically connected to the current blocking member; and a CID gasket surrounding an edge of the current blocking member, wherein the CID gasket includes a reinforcing material, wherein the reinforcing material includes at least one of glass fiber, carbon fiber, aramid fiber, cellulose, ceramic particles, and a filler.
  • CID current interrupt device
  • a safety vent disposed on the current blocking member and electrically connected to the current blocking member
  • a CID gasket surrounding an edge of the current blocking member, wherein the CID gasket includes a reinforcing material, wherein the reinforcing material includes at least one of glass fiber, carbon fiber, aramid fiber, cellulose, ceramic particles, and a filler.
  • the CID gasket may include a first portion surrounding an edge of the current blocking member and a second portion positioned on the first portion and extending in a central direction of the current blocking member.
  • the second portion may extend between the safety vent and the current blocking member.
  • the CID gasket includes a polymer resin, and the polymer resin includes polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and perfluoroalkoxyalkane. (perfluoroalkoxy alkane, PFA) may be included.
  • PP polypropylene
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • PFA perfluoroalkoxy alkane
  • the CID gasket may include a polymer resin, and the polymer resin may include polybutylene terephthalate (PBT).
  • PBT polybutylene terephthalate
  • the current blocking member may include an outer periphery and a blocking portion surrounded by the outer periphery, and the blocking portion may be separated from the outer periphery when an internal pressure of the secondary battery increases.
  • the safety vent may be electrically connected to the blocking unit.
  • the secondary battery may further include an electrode assembly including a positive electrode, a negative electrode, and a separator, and the outer periphery may be electrically connected to the positive electrode through a positive electrode tab.
  • the secondary battery may further include an upper cap positioned on the safety vent and electrically connected to the safety vent.
  • the secondary battery may further include a cylindrical case.
  • the CID gasket according to the embodiments of the present invention includes a reinforcing material, heat resistance and thermal deformation temperature increase, and even if melting occurs even in a high-temperature and high-pressure environment, insulating properties can be maintained. Accordingly, it is possible to manufacture a secondary battery with improved safety.
  • FIG. 1 is a partial cross-sectional view of an upper portion of a conventional cylindrical secondary battery.
  • FIG. 2 is a partial cross-sectional view illustrating a state when the internal pressure of the cylindrical secondary battery of FIG. 1 is increased.
  • FIG 3 is a partial cross-sectional view of an upper portion of a secondary battery according to an embodiment of the present invention.
  • FIG. 4 is a partial cross-sectional view illustrating a state when the internal pressure of the secondary battery of FIG. 3 is increased.
  • 5 to 8 are graphs showing the results of the external short-circuit evaluation performed for Example 1, Example 2, Comparative Example 1, and Comparative Example 2, respectively.
  • 9 to 12 are graphs showing the results of external short-circuit evaluation performed for Example 3, Example 4, Comparative Example 3, and Comparative Example 4, respectively.
  • 13 to 16 are photographs sequentially showing a CT image, a top cap, and a sealing gasket after the current blocking member is separated for Example 3, Example 4, Comparative Example 3, and Comparative Example 4, respectively.
  • 17 and 18 are graphs showing the results of external short-circuit evaluation performed for Examples 5 and 6, respectively.
  • a part of a layer, film, region, plate, etc. when a part of a layer, film, region, plate, etc. is said to be “on” or “on” another part, it includes not only cases where it is “directly on” another part, but also cases where there is another part in between. . Conversely, when we say that a part is “just above” another part, we mean that there is no other part in the middle.
  • the reference part means to be located above or below the reference part, and to necessarily mean to be located “on” or “on” in the direction opposite to gravity no.
  • planar view it means when the target part is viewed from above, and "in cross-section” means when viewed from the side when a cross-section of the target part is vertically cut.
  • FIG 3 is a partial cross-sectional view of an upper portion of a secondary battery according to an embodiment of the present invention.
  • the electrode assembly 500 is inserted into the cylindrical case 200 , an electrolyte is injected therein, and a cap is placed on the open upper part of the cylindrical case. It may be manufactured by mounting the assembly 300 .
  • the electrode assembly 500 has a structure in the form of a jelly roll wound with a separator 530 interposed between the positive electrode 510 and the negative electrode 520 , and a center pin (not shown) may be inserted into the center thereof.
  • the center pin is generally made of a metal material to impart a predetermined strength, and has a hollow cylindrical structure obtained by bending a plate material in a round shape.
  • the center pin may act as a passage for fixing and supporting the electrode assembly 500 and for discharging gas generated by an internal reaction during charging, discharging, and operation.
  • the cap assembly 300 includes a top cap 310 and a safety vent 320 , and the top cap 310 is located on the safety vent 320 , and forms a structure in close contact with the safety vent 320 . can be electrically connected.
  • the upper cap 310 has a structure in which the center protrudes upward, and is electrically connected to the positive electrode 510 of the electrode assembly 500 to function as a positive electrode terminal for connection with an external circuit. Specifically, the upper cap 310 may be indirectly connected to the positive electrode 510 through the safety vent 320 , the current blocking member 600 , and the positive electrode tab 511 .
  • the cylindrical case 200 may include a beading part 210 and a crimping part 220 .
  • the beading part 210 refers to a portion in which a part of the cylindrical case 200 is recessed in the center direction of the electrode assembly 500 , and is used for stable coupling of the cap assembly 300 and preventing flow of the electrode assembly 500 . will be.
  • the crimping part 220 is located above the beading part 210 and refers to a part surrounding the cap assembly 300 , and is for stable coupling of the cap assembly 300 .
  • the sealing gasket 400 is mounted on the inner surfaces of the crimping part 220 and the beading part 210 to increase the sealing force between the cap assembly 300 and the cylindrical case 200 . That is, the crimping part 220 is formed by placing the sealing gasket 400 between the cylindrical case 200 and the cap assembly 300 and bending the end of the cylindrical case 200 . Through this, the cap assembly 300 may be mounted and the secondary battery 100 may be sealed.
  • the negative electrode tab connected to the negative electrode 520 of the electrode assembly 500 may be bonded to the cylindrical case 200 . Accordingly, the cylindrical case 200 may function as a negative terminal for connection with an external circuit.
  • a current blocking member 600 (Current Interrupt Device, CID) and the CID gasket 700 are positioned.
  • CID Current Interrupt Device
  • the secondary battery 100 includes a current blocking member 600 , a safety vent 320 positioned on the current blocking member 600 and electrically connected to the current blocking member 600 , and a current blocking member 600 .
  • a CID gasket 700 surrounding the edge.
  • the CID gasket 700 may include a reinforcing material, and the reinforcing material may include at least one of glass fibers, carbon fibers, aramid fibers, cellulose, ceramic particles, and fillers.
  • the safety vent 320 is a thin film structure through which an electric current passes, and two grooves 321 and 322 having different depths are formed therein.
  • the current blocking member 600 is a member of a conductive plate material, and may include an outer peripheral portion 610 and a blocking portion 620 surrounded by the outer peripheral portion 610 . Also, although not specifically illustrated, a plurality of through holes for discharging gas may be formed. Meanwhile, for separation between the outer peripheral portion 610 and the blocking portion 620 to be described later, the boundary between the outer peripheral portion 610 and the blocking portion 620 may be designed to have relatively weak strength.
  • the CID gasket 700 includes a first portion 710 surrounding the edge of the current blocking member 600 and a second portion ( 720) may be included. More specifically, the second portion 720 may extend between the safety vent 320 and the current blocking member 600 .
  • FIG. 4 is a partial cross-sectional view illustrating a state when the internal pressure of the secondary battery of FIG. 3 is increased. Specifically, when the internal pressure of the secondary battery 100 increases, the safety vent 320 and the current blocking member 600 block the current.
  • the outer peripheral portion 610 is electrically connected to the positive electrode 510 of the electrode assembly 500 through the positive electrode tab 511
  • the blocking portion 620 is the safety vent 320 . It may be electrically connected to the lower surface. There is no particular limitation on this electrical connection method, and it may be connected by welding. In a normal operating situation of the secondary battery 100 , the positive electrode tab 511 , the current blocking member 600 , the safety vent 320 , and the top cap 310 are electrically connected so that the secondary battery 100 is connected to an external circuit. do.
  • the shape of the safety vent 320 is reversed. Accordingly, as shown in FIG. 4 , the blocking part 620 is separated from the outer peripheral part 610 , and the electrical connection between the external circuit and the electrode assembly 500 is blocked. Through this, even if the secondary battery 100 is exposed to high temperature or the internal pressure rises due to internal heat generation, it is possible to prevent explosion or ignition.
  • the second portion 720 of the CID gasket 700 extends between the safety vent 320 and the outer peripheral portion 610 to prevent the safety vent 320 from contacting the outer peripheral portion 610 . . That is, after the outer peripheral part 610 and the blocking part 620 are separated, the safety vent 320 prevents the outer peripheral part 610 from contacting, reconnection, that is, it can block the flow of current again.
  • the CID gasket is melted or deformed to prevent contact between the safety vent 320 and the outer peripheral portion 610 in some cases.
  • the CID gasket 700 may include a reinforcing material to increase heat resistance and thermal deformation temperature. Accordingly, even in a high-temperature and high-pressure environment, the safety vent 320 and the outer peripheral portion 610 are blocked from contacting, so that insulation can be maintained.
  • the reinforcing material according to this embodiment may include at least one of glass fibers, carbon fibers, aramid fibers, cellulose, ceramic particles, and fillers, and in particular, preferably include glass fibers.
  • the CID gasket 700 includes a polymer resin and may be manufactured by injection molding.
  • These polymer resins include at least one of polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and perfluoroalkoxy alkane (PFA). can do.
  • polypropylene PP
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • PFA perfluoroalkoxy alkane
  • PBT polybutylene terephthalate
  • PPS polyphenylene sulfide
  • a material such as polybutylene terephthalate (PBT) or polypropylene (PP) is an elastomer with good elasticity, and when such material is included, injection property is improved, so it is easy to mold the CID gasket 700 .
  • a polymer resin such as polypropylene (PP) or polybutylene terephthalate (PBT)
  • PBT polypropylene
  • the CID gasket 700 includes a polymer resin such as polypropylene (PP) and polybutylene terephthalate (PBT) to secure formability and ductility, and at the same time, a reinforcing material such as glass fiber. Insulation properties can be maintained even in high-temperature and high-pressure environments, including
  • the mass of the reinforcing material relative to the mass of the CID gasket 700 may be 15% or more and 50% or less, and more preferably 25% or more and 40% or less.
  • the CID gasket 700 may include polybutylene terephthalate (hereinafter referred to as PBT) and glass fiber, compared to the total mass of the CID gasket including the PBT and the glass fiber.
  • the mass of the glass fiber may be 15% or more and 50% or less.
  • the mass of the reinforcing material relative to the mass of the CID gasket 700 is less than 15%, the heat resistance and thermal deformation temperature of the CID gasket 700 cannot be increased as much as desired. As a result, after separation of the current blocking member 600 , the safety vent 320 and the outer peripheral portion 610 may not be blocked from contacting so that reconnection may occur. Meanwhile, a plurality of secondary batteries 100 may be gathered to form a battery pack. In this case, it may be preferable that the mass of the reinforcing material is 25% or more relative to the mass of the CID gasket 700 .
  • the CID gasket 700 When the mass of the reinforcing material relative to the mass of the CID gasket 700 in the battery pack unit is less than 25%, the CID gasket 700 may be melted without being able to withstand the heat and pressure inside the battery pack. Reconnection may occur, which may lead to thermal runaway or explosion of the battery pack.
  • the CID gasket 700 can be manufactured by injection molding after adding the reinforcement to a polymer resin such as PBT. can
  • PBT+GF (30%) PBT Heat-deflection temperature at 0.45MPa 220 150 Heat-deflection temperature at 1.8MPa 200 60 Upper working temperature (°C) 120-200 120 Melting point (°C) (Melting temperature) 225 223
  • Table 1 is a table comparing the thermal characteristics of a CID gasket containing PBT and glass fiber (GF) and a gasket containing only PBT as an experimental group and a comparative group of the present invention.
  • the mass of glass fiber to the mass of the CID gasket is 30%.
  • Examples 1 and 2 were prepared by applying a CID gasket containing PBT and glass fiber to an 18650 cylindrical battery, and Comparative Examples 1 and 2 were prepared by applying a CID gasket containing only PBT to an 18650 cylindrical battery.
  • the mass of the glass fiber relative to the mass of the CID gasket was 30%.
  • Examples 3 and 4 were prepared by applying a CID gasket containing PBT and glass fiber to a 21700 cylindrical battery, and Comparative Examples 3 and 4 were prepared by applying a CID gasket containing only PBT to a 21700 cylindrical battery.
  • the mass of the glass fiber relative to the mass of the CID gasket was 30%.
  • FIG. 13 to 16 are photographs sequentially showing a CT image, a top cap, and a sealing gasket after the current blocking member is separated for Example 3, Example 4, Comparative Example 3, and Comparative Example 4, respectively.
  • the CT image shows the upper part where the cap assembly is located in the cylindrical cell.
  • Examples 5 and 6 were prepared by varying the content of glass fibers included in the CID gasket for the 18650 cylindrical battery. In addition, after forming a battery pack by configuring 5 (series) * 2 (parallel) 18650 cylindrical batteries, an external short circuit evaluation was performed.
  • Example 5 the mass of glass fibers relative to the mass of the CID gasket was prepared to be 30%, and in the case of Example 6, the mass of glass fibers to the mass of the CID gasket was prepared to be 20%.
  • Example 5 the current blocking member was disconnected at 50.6 seconds (sec), and thereafter, reconnection did not occur.
  • Example 6 the current blocking member was disconnected at 49.4 seconds (sec), but reconnection occurred after that, which eventually led to an explosion.
  • the CID gasket cannot withstand heat and pressure inside the battery pack and the CID gasket is melted and reconnection is difficult. may occur, which may lead to thermal runaway or explosion of the battery pack.
  • One or more secondary batteries according to the present embodiment described above may be applied to various devices. Specifically, it may be applied to transportation means such as electric bicycles, electric vehicles, hybrids, etc., but is not limited thereto and may be applied to various devices that can use secondary batteries.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

Selon un mode de réalisation, la présente invention concerne une batterie secondaire comprenant : un dispositif d'interruption de courant (CID) ; un évent de sécurité positionné sur le dispositif d'interruption de courant et connecté électriquement au dispositif d'interruption de courant ; et un joint CID destiné à entourer les bords du dispositif d'interruption de courant, le joint CID comprenant un matériau de renforcement, et le matériau de renforcement comprenant au moins un élément parmi la fibre de verre, la fibre de carbone, la fibre aramide, la cellulose, des particules céramiques et une charge.
PCT/KR2021/004280 2020-04-06 2021-04-06 Batterie secondaire et dispositif la comprenant WO2021206418A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21784942.1A EP4089829A1 (fr) 2020-04-06 2021-04-06 Batterie secondaire et dispositif la comprenant
US17/799,830 US20230087398A1 (en) 2020-04-06 2021-04-06 Secondary Battery And Device Including The Same
CN202180016335.0A CN115191062A (zh) 2020-04-06 2021-04-06 二次电池和包括该二次电池的装置
JP2022547173A JP2023513117A (ja) 2020-04-06 2021-04-06 二次電池およびこれを含むデバイス

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2020-0041436 2020-04-06
KR20200041436 2020-04-06
KR10-2021-0044214 2021-04-05
KR1020210044214A KR20210124079A (ko) 2020-04-06 2021-04-05 이차전지 및 이를 포함하는 디바이스

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WO2021206418A1 true WO2021206418A1 (fr) 2021-10-14

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US (1) US20230087398A1 (fr)
EP (1) EP4089829A1 (fr)
JP (1) JP2023513117A (fr)
CN (1) CN115191062A (fr)
TW (1) TW202143533A (fr)
WO (1) WO2021206418A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2020059732A1 (fr) * 2018-09-18 2020-03-26 株式会社Ｇｓユアサ Procédé de commande de système d'alimentation de corps mobile, et système d'alimentation de corps mobile
KR20220151467A (ko) * 2021-05-06 2022-11-15 삼성에스디아이 주식회사 이차 전지

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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